6 articles for "Altitude"

**Altitude**[Astro*Index]

Height above sea level, measured in meters or feet. Common usage also employs the word elevation for this same linear measure. In the *Horizon coordinate system*, the *angular distance* of any body above or below the plane of the Horizon, measured positively above (negatively below) the Horizon.

See also: ♦ Horizontal Parallel ♦ Horizon ♦ Celestial Coordinates ♦ Angular Distance

**Altitude**[Prima]

The altitude is the second angle in the horizonal system of celestial coordinates (the first is azimuth). Altitude is measured as the angular distance of any body above or below the plane of the horizon, measured positively above and negatively below. The term elevation is sometimes used instead.

In geography, altitude is the height above sea level, measured in meters (or feet).

**Altitude Circle** – a small circle on the celestial sphere whose points have the same altitude above or below the horizon.

See also: ♦ Horizontal Parallel ♦ Horizon ♦ Celestial Coordinates ♦ Angular Distance

**Altitude**[Munkasey M.]

An arc of measurement in the Horizon system of co-ordin-ates, from the horizon towards the zenith along a vertical circle to some body.

See also: ♦ Horizontal Parallel ♦ Horizon ♦ Celestial Coordinates ♦ Angular Distance

**Altitude**[DeVore]

Elevation above the horizon, measured by the arc of a vertical circle. A planet is at meridian altitude when it is at the Midheaven, the cusp of the Tenth House.

See also: ♦ Midheaven ♦ Horizontal Parallel ♦ Horizon ♦ Celestial Coordinates ♦ Angular Distance

**Altitude Circle**[Astro*Index]

A small circle (on the celestial sphere) on which a point has the same altitude above (or below) the Horizon. An Altitude Circle has the same relationship to the Horizon that a circle of geographic latitude has to the plane of the Earth's equator.

See also: ♦ Geographic Coordinates ♦ Small Circle ♦ Celestial Sphere ♦ Earth's Equator

**Altitude Circle**[Munkasey M.]

A circle used in the Horizon system of coordinatesto measure a body's distance (up or down) from the Horizon. This is analogous to a circle of equal latitude in the Earth's geographic reference system.

See also: ♦ Geographic Coordinates ♦ Small Circle ♦ Celestial Sphere ♦ Earth's Equator

Astro*Index Copyright © 1997 Michael Erlewine